42403213 has 2 divisors, whose sum is σ = 42403214. Its totient is φ = 42403212.

The previous prime is 42403189. The next prime is 42403217. The reversal of 42403213 is 31230424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38415204 + 3988009 = 6198^2 + 1997^2 .

It is a cyclic number.

It is not a de Polignac number, because 42403213 - 2¹³ = 42395021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42403217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201606 + 21201607.

It is an arithmetic number, because the mean of its divisors is an integer number (21201607).

Almost surely, 2^42403213 is an apocalyptic number.

It is an amenable number.

42403213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42403213 is an equidigital number, since it uses as much as digits as its factorization.

42403213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42403213 is about 6511.7749500424. The cubic root of 42403213 is about 348.7114880629.

Adding to 42403213 its reverse (31230424), we get a palindrome (73633637).

The spelling of 42403213 in words is "forty-two million, four hundred three thousand, two hundred thirteen".